The Sindhi nationalist historiography is a classic case of how to read historical, archaeological, and political texts of importance to justify the present-day modernist ideologies premised on excluding marginalized sections of society. This essay interrogates the Sindhi nationalist literati elite’s epistemic neglect of the underprivileged caste’s lifeworld. That disregard reflects in their literary and political writings that arguably rely on the British Orientalist historiography to construct the myth of caste-neutral and egalitarian culture of Sufi Sindh. It traces the historicisation of the claim of Hindu–Muslim interfaith harmony, and its persistence in the post-Partition Sindh. Based on the content analysis of progressive literature and the historiography of progressive politics in Sindh, it is concluded that owing to the casteist social structural barriers the privileged caste elite at the vanguard of progressive nationalist politics was blinded by their own privileged position to justly address the caste question. That inherent blindness to see through the problem of caste is the reason that progressives’ emancipatory projects to redefine the past and myths end in failure.